Motor-controller.



H. w. GHENEY.

MOTOfi GONTROLiJER. AP PLIOAT ION FILED OUT. 25, 1909 965,280. Patented Jul 26,1910. 4 Sums-sans"! 1.

' TART/N4 H. W. CHENEY.

MOTOR GONTROLLER. APPLIOATION FILED 00125, 1909.

, Patented July 26, 1910.

4 SHEETS-$11321 Z.

vidr

11. w. CHENEY. MOTOR CONTROLLER. APPLIOATION FILED 0013.25, 1909.

965,280, Patented July 26,1910 Q SHEETSSLHEET 3.

- H. w. CHENEY.

MOTOR GONTROLIJER. APPLICATION. PILEIJ 0013.25. 1909.

' Patented Ju1y26, 1910.

4 SHEETS-SHEET 4.

BEST AVAlLABLE COP' ATENT OFFICE.

HERBERT W., C'ttENEY OF MILWAUKEE, WISCONSIN, AssIGNonTo ALLIs-cHALiwE-Rs datentl(3,84l3, granted simplify the position Figs. 3

of the controller; and

COMPANY, A CORPORATION OF NEW JERSEY.-

. MoToR-coNTiwLLER;

Specification of Letters Patent. Patented July 26, 1 910; Application tiled October 25. 1909, Serial No. $24,351: 3 i

oo5,2so.

To all ill/tom it may concern:

Be it known that I, llic'mncn'r CHENEY, a citizen of the l'nited States. residing'at. Milwaukee, in the county of Milwaukee and State of \Visronsin.have invented certain new and usct'ul l'niprovenients in Motor- (hintrollers, otwhieh the following" is a fulh clear. and exact spw-itieation.

My inventionrelates to starting controllers for electric ni )tors.':i1id more particularly to fool-proof potential starlers-for polyphase induction i motors; are Within ln operating st connected between the two of the intrins the main ltbeing connected to'one terminal; of each windin'gf- One of the 3 terminals oft the niotor M is eonnectedto those two teeininals of the windings Hand 12* which a artine -devieesv for some types of'n'iotors, especially potential starters for induction motors, it often unde.--:ira.ble that the controller bemoved backward from a running to the starting position. To this end controllers have been designed] which nnn'e direetly fronrthe running to the off position without passing throughthe start- I V H my log positions. Also, it is o'tten desirable that 4 12 an 12a respechvdy I The; it. be impossible to'leave a controller in a windings 12 and 12 thus constitute in effect,

starting position. For instanee inpotential starters for induction motors, in" various windings which are connected in circuit, when the controller is in a starting position are proportioned to carry current not C0111 tinuously but only for :1 brief period during starting. it, may also be desirable to have means wherebyupon certain abnormal con- 'ditions such as no voltage or an overload, the controller is automatically moved fromrunnineto otl' position. These things are all aecomplislwd by the controller shown in .my

Mar. 30, 1009. present invention to construct ion shown in the aforesaid patent, and yet to lose none of the bencfitsobtained by the arrangement shown in such patent. I

The various novel features of my invention will appear froin the description and drawings, and will 'be parti nllarly pointed outinttho elail'ns. y

Figurel is a side elevation of a controller? embodying my inventioin;some of the parts being shown in section; Fig; '2 is an end ole vatioii of the controller"of Fig,1, with the front cover removed .a single V-connected auto -transfo1 me13 the; main IL and the middle terminal of the inojto being connected to fthe'm'iddle ofthe V When the controller is in running position the alite-transformer windings 12 and 12 are entirely disconnected and the motorgter ini-nals. are connected 'tothe three mains re specti'vely. In the controller shownthere i 5 but one starting position between Iofi an running position, butjit is obvious that any; desired number of such starting posit-ions may be employed. f p p i t Ij The normal operation of the controllers is always in the same'direction, through 180oo'nstitutinga eorn' tion. The eontrollerdi'um 14, v I I incised in oil in the tank 15, is moved by the 0R operating handle 16 through the gearwheels 17 and 18. The opposite halves-of the con-i troller drum are identical in structure, and each His the object of my I 1 fingers during su'c'cessiv operations of the controller, the sets of 0011:3110!) tact fingers being opposite sides of the drum and arranged simultaneously to 00-}, aet-"with'the' two halves of the drum re-fll; sp'eetively.' f' 1 and the controller in otf anc'tt'show parts of the operatingineclnniisinin st arting; and running position respectively; Fig. 5 is a, develop' nentof the notched ring on the front cover Fig. 6-is a diagram of thoelectrica] connections. l

and gear iney he parts of the some castin if desired. 'A member22, pivoted on a p 23, is provided with gear teeth which at BEST AVAILABLE certain times mesh with the teeth of the gear 21, and with a. roller 24: which at certain times rides on" the periphery of the cam wheel 20. The member 22 is biased, as by a spring 25, in a. clockwise direction to the position in which it is shown in Fig. 2. A11 arm 26, pivoted, on a pin 27, is the armature of a no voltage magnet 28, connected across two of the motor leads. The arm 26 is biased toward the no voltage magnet 28, as by a spring 29, and carries a roller 30 which at certain times engages the cam wheel 20 to prevent clockwise movement thereof. In the circuit of the no voltage magnet 28 may be connected one or morenormally closed switches 31. -'lhe solenoid or solenoids of these magnets are conneeted in one or more of the motor leads so that they are responsive. to an overload on the motor when the controller drnni 1-]: is in running position. On the front cover 33 of the controller casing is a notched ring 34, the notches of which are best shown in the development of Fig. The ring cooperates with a spring-pressed plunger 35 mounted in the handle it to prevent backward movement of the controller from oll and running positions aml to accentuate the starting positions.

\Vhcn the controller is in oll' position the parts are as shown in I igs. l, 2, and b. The roller Z-l is in ngagcmcnt with the notch 36 ot' the cam wheel 20. and through such cugagcmcnt backward movement. of the controller is prevented. Backward movement is also prevented by the tooth of the notched ring 3% at oll' position. 3y moving the handle lt' sub-tantially fit) in a clockwise direction, the starting position, illustrated in Fig. 3, is reached, aml the motor is connected to the supply circuit through the auto-transi'ormcr windings l2 aml 12. The operator feels wlu-n this starting position is reached on account ol' thc engagement of the plunger 35 with lhc inclinc ol' the notched ring ill at, the starting position. .\s the controller is movcd .lrom oll' to starting position the mcmbcr is forced in a count(er-clockwise (lil'cctlml against the action of the spring 25. This movement of the member 22 is caused at lirst'throngh the cngagcnu-nt. of the notch '6 and rollcr 2t and later through the engagcment. ol lhc tccth of tho mutilated gear 21 with those of lhc mcmbc.r 22, these tcclh having been brought" into engagement during the early part ol" the rotation of the members .20 and 22. Should the opcrator rclcasc the handle lti'with the controller in this starting position, the spring will move the member 22 in a clockwise direction, and through such'movemcnt \vill'cause the handle it and controllcr drum 1?) to bc rcturncd to oli' position. 'lhns it is impossiblc for the controller to be left in starting position without. attention.

If the ope 'ator does not release his grasp on the handle 16 while thecontrollcr is in starting position, but when the motor has gained sutiicient speed moves the handle substantially (10 farther in a clockwise direction, the controller is ln'ought to running position, as shown in Fig. 4. This movement of the drum disconnects the anto-transformer windings completely and connects the motor terminal directly to the supply mains. As the handle 16 is moved from starting to running position, the member 2'25 is moved farther in a conliter-clockwise dircction against the action of the spring .25. this movement bcing obtained lirst by the gear teeth on the gear 2t and member 22 and later by the cam surface 237 and roller "J-l. This rollcr passes over the point 38 of the cam whccl just before running position is reached. lSy means ol. the spring 25 and member the conli'ollcr is thus biased l):l(fl \\"dl'tl to oll' position until just before the running position shown in Fig. 4 is reached, and will be moved backward to such oll' position it the operator releases his grasp on the controllcr handle at any time before roller 20 has passed over the oint 38. Backward movement of the control or from running position is prevented by the tooth ot' the notched ring lit at such position.

When the controller is tally in running position, the roller 24 engages the cam surl'acc 3 ol the cam whorl 2t), and the spring 25 biases such wheel, a 11.1 through it the controllcl' drum, forward to oil position. This bias, howcvcr, is prevented from moving the controllci because of the engagement of the outcr cnd of the cam surl'ace 37 with the rollci' Ill), which is held in the position shown in lfull lines in Fig.1 by the no voltage magnet 28. Should no voltage conditions prevail in the supply circuit for the motor, or should the motor take excessive current and cause the opening of any one of the switches 31. the magnet 28 is dciincrgized, and the spring #5 acting through the roller 24 and cam surfl'acc 3t), overcomes the spring 2. amt moves the controller l'orward to ott' position. The controller may he, moved manually forward from running position to ott position by applying a little force to the controller handle lt' aml thus ovcrconiing the pull ol the magnct 38 on the arm in. Whether the movement. of the controller from running position to oil position is obtained manually or antomatically, the rollcr 2t slides down the cam surt'ace 2-H) to the notch 36 aml does not strike a hammer blow. This'as found to be of considerable advantage both in lessening the noise of operating and in eliminating the shock to the controller. \Vh n the. controller reaches olijmsition it is-prevontcd from being moved backward to running position by the t'opth at the oll' position on lhc notched ring 3t.

iao

a. departure from the spirit "operating hamlle there tor,

hon when it is BEST AVAILABLE the two elnls of the mutilated gear 21, andt'hc two halves ot the controller (lrum being intercha Igetl.

Many motlitications may be nnnle in the t precise V arrangement herein shown tllltl (lerihetl, amt all such which do not involve invention I aim to cover in the following claims.v c

What I claim as new is:

1.; In a controller, a rotatable tlrum, an

' a gear amt a cam wheel mechanicallyconnected tothe (ll'tllll. an i a spring which thecam wheel and to bias saitl tlr nn backward when in a starting position and position. 2. In a controller, operatinghandle therefor, a gear and a cam wheel mechanically connected to the (li'um', ii springwhich man wl ieel bias said tllltlll lau-kwartl when in a starting position anti forward when in running position, and means such bias from being elt'eetive. when the (lrumis in running position. i l

3. In a i.-ontroller,.a rotatable drum, an operating handle therefor,a 'gear and a cam wheel mechanically connected .to the drum,-

a spring which acts at times through the cam wheel and at times through the gear to bias'saitl drumbackwardwhen in a starting position and forward when in running position, and a latch for normallyholtling the (train against forward movement when it is in running position.

4. In a controller, operating handle therefor,a gear anclia .eam wheel mechanically connected= to the drum, a spring which acts at times through the cam wheel and attimes through the gear to bias Sititl tlru'm' backward when in a starting position tllltl fOl'Wtlid when iii-running posit ion, a latch in running position, and means for renderin said latch operative only upon the absence of preileterminecl abnormalconditions. t

, 5. In a controller, a controller drum lmving oti', starting, and running ositions, ,a cam wheel and agear ineehanica 1y connect ed to said drum,

when it is in running. position. 6. In a controller, a controller drum having ofl,fsta'1't ing, and running positions, a cam wheel and a gear mechanica ly connected to said drum, a spring-pressed member and scope ot' my 1 acts at times through at times through the gear forward when in running" acts at times through the 2llltl at times through thet'ge'ar to for i'iormally preventinga rotatable drum, an

for n n'mallyv holding the (lllllll against; forward movement; when it is a springpressed member which pooperateswith said cam Wheel and: gear to bias'the drum backwar to off posiany'starting" position and to bias the drum forwardto otf position t l l i l l l arotatiahk. (ii-um, an I in oil, ram wheel ainl a which cooperates with saitl,

to bias the (tram -ofth'e drum frorn theolf pos tions,aw"cam wheel and a gear, a s rm gcarto bias thevtlrum backward "to otf position when it isinany starting position and to bias the J when it is for normally hohling: said (ll'ttlll against ton want movement l'rom running position. T. in a controller; a controller 'tll'lllllhtiV- starting, tllltl runiiing positions, a.

gear mechanically connect- Hi to saitl lrum, a spring-pressed member cam wheel "and drum fOlWtll'tl to off position in rnnmngipos tion, and a'lz'itch gear to bias the tll'lllll l'iackwartl to-otf posi- 1 tion' when when it is in running nornutll holding saitl (ll'ltlll against for- -\\'2H'tl movement from running positim'nand a no-voltage magnet which whenenergizcd leinlels Siliti latch operative.

8. in a ct'introller, a controller tl l'ltlfl havihg oti'. starting, illitl running: positions, a can: wheel and etl -to saiil (lrunr a' springint which cooperates with sai lcan'iwheel and gear to bias the (ll'illll lnu-ltwrmtltootfposition when it is in any startingpositionand to bias the drum forward to off position when itis in running position, alatch for normally lioliling saiil drum against for} ward movement from running position, a

no-voltage magnet which when energized renders said latch operative, and means for it is m anv starting,position and torwai'tl to on position .i t pos tion, a. latch for i a gem; mechanica ll vconnectsetl' member causing the detinergization of said magnet;

upon an overloadi 9. In a controller, a drum having oil, starting,aml running positions and nor mally movable always inthe same direction, means 'fQIY'PPOVGHCiDg backward movement; of the drum from the off and the running positions, acam wheel and a gear, and a spring-pressed member which cooperates withsanl cam wheel antl'gearto bias said drum backward to off tion when :it isin running position. i

10. In a controller, 2r drum having oil, starting, and running positions and notmalty movable always lathe-same direction, means for preventing. backward' movement and the running pressedniember which cooperates wit said cam whcelwto bias said vcontroller backward to oti' position when it is in an osition from which 1t ma-; be'rnoved ieh? it; may" be "moved backward and starting, and running positions and nor mally movable always in the same direction, means for preventing backward movement BEST AVAILABLE cop,

of the drum from the off and the running positions, a-cam wheel and a gear, a springpressed member which cooperates with said cam wheel and gear to bias said controller backward to ofl position when it is in any position from which it may be moved backward and to bias it forward to oti' position When it is in running position, means for preventing such bias from being effective when the drum is in running position. and means for rendering the last mentioned means inoperative upon abnormal eonditions.

12. In a controller, a drum having oil', starting, and running positions and nor-v mally movable always in the same direction, means for preventing backward movement of the drum from the off and. the running positions, a cam wheel and a. gear, a springpressed member which cooperates with said cam wheel and gear to bias said cont-roller backward to otf osition when it is in any position from which it may be moved backward and to bias it forward to ofi position when itis in running position, means for preventing such bias from being effective when the drum is in running position, and means for rendering said lastmentioned means inoperative upon n'o-voltage or over- 0 load.

13. In a controller, a controller drum normally movable always in the same direction and having oil', starting, and running positions, means for biasing said drum backward to oti' position when it. is in a starting position and Forward to oil' position when it is in running position. a magnet connected aeross the supply circuit, and means operative while, such magnet is energized for preventing the aforesaid bias from being effective when the controller is in running position.

14. In a controller, a controller drum normally movable always in the same direction and having oil', starting, and running positions, means for biasing said drum backward to ofi' position when it is in starting position and forward to oii' position when it is in running position, a magnet connected across the supply circuit, means operative while such magnet is energized for preventing the aforesaid bias from being effective when the controller is in running position, and a switch in the circuit of said magnet which is opened upon an overload.

Milwaukee, Wis, Sept. 28, 1909.

In testimony whereof I atlix my signature, in the presence of two witnesses.

HERBERT W. CHENEY.

Witnesses:

CnAs. L. BYRON, Ron. i Storm. 

